Lucien stephen grand all



(No Model.)

L. S. ORANDALL. CYCLE OR OTHER DRIVE CHAIN.

No. 591,819. Patented Oct. 19,1897.

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IlrirrEn STATES PATENT ()FFICE.

LUCIEN STEPHEN GRANDAIJL, OF'BIRMINGHAM, ENGLAND.

CYCLE OR OTHER DRIVE-CHAIN.

SPECIFICATION forming part of Letters Patent No, 591,819, dated October 19, 1897. Application filed December 29, 1896. Serial No. 617,321. (No model.)

To all whom it may concern:

Be it known that I, LU OIEN STEPHEN CRAN- DALL, a citizen of the United States of America, and a resident of Clarence Chambers, Corporation Street, in the city of Birmingham, England, have invented certain new and useful Improvements Relating to Cycle or other Driving-Chains, of which the following is a specification.

This invention consists of improvements relating to cycle and other driving-chains, my object being to produce at small cost an efiective and durable power-transmitting chain and to so arrange the same that any link in the chain can be readily attached or detached.

In order that my invention and the manner of carrying the same into effect may be the more readily understood, I append hereunto a sheet of explanatory drawings, to be hereina'fter referred to.

Figures 1 to 6, inclusive, are detailed views illustrating myimproved construction of the chain-blocks. Figs. 7 to 9, inclusive, represent one method of constructing myimproved roller-chain, and Figs. 12 and 13 another construction of such chain.

The same reference-letters in the different views indicate the same parts.

The blocks illustrated by Figs. 1 to 6 I build up with pins and with piercings or stampings from steel or other metal, preferably of the same thickness or gage as the plates from which I pierce or stamp the links. I am thus enabled to build up the complete links and blocks with stampings made from the one plate or one thickness or gage of plate, in conjunction with pins 0, having flat-sided heads.

To form the block, I stamp out a blank D, such as illustrated at Fig. 1, which I fold or form to the configuration shown at Figs. 2, 3, and 4, consisting of side pieces with a central bridge or connecting-strip. Iinsert between the side pieces of the blank, preferably before pressing the same to the required configuration, the stamped washers or collars E, Figs.

4: to 6, inclusive, each collar being secured-by its own pin, as illustrated. I preferably rivet over the inner end of the stem of each pin 0 in order the more effectually to secure the collar and the pin in place.

In the construction of the roller-chain ill ustrated at Fig. 7 I replace the fixed collars E, Figs. 4: to 6, with the rollers F, Fig. 7, which I mount freely upon the stems of the pin 0,

one of which is illustrated at Figs. 8 and 9. The pins are secured within the frames in one convenient manner by frictional contact, or they may be held by other means. The diameter of the rollers is such as to cause them to project but slightly beyond the adjacent ends or extremities of the block or frame to which they are attached, and thus on the wear of the rollers or slight yielding of the same together with the pins in the event of the imposition of an undue stress or pressure the periphery of the rollers will become flush with the extremities of the frame, which will thus receive a direct application of the force from the chain-wheel.

With the roller-chain illustrated at Fig. 11 I employ but one roller upon each pair of pins, and to assist in'securing the pins within the frame I sometimes cut a groove in the portion of the pin fitting withinthe frame or block,

as illustrated in the separate view of the pin.

at Fig. 10 and also by dotted lines at Fig. 11, and I then force or spin a portion of the metal forming the block side plate into such groove by suitable beading or like tools, and thus effectually secure the two parts together.

Any suitable links or side plates may be employed between my improved blocks, and I sometimes employ ordinary pins or rivets instead of the pins having T-shaped heads, as hereinbeforedescribed.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In combination the links, the central block formed of one piece bent back or folded upon itself, the pins extending through the links and blocks and the wear-pieces between the bent back portions of the block D, the said blocks forming the inner wearing parts of the chain and the pins projecting beyond the blocks to receive the outer links, substantially as described.

2. In combination the links, the block D bent back or doubled upon itself to leave a space between its sides, the wear-pieces between the links and the pins formed in two parts each engaging one of the wear-pieces, substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

LUCIEN' STEPHEN ORANDALL.

Witnesses:

EDWARD MARKS, HERBERT BOWKETT. 

